CN101227218B - Method, apparatus and system for precoding in MIMO - Google Patents
Method, apparatus and system for precoding in MIMO Download PDFInfo
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- CN101227218B CN101227218B CN2008100063132A CN200810006313A CN101227218B CN 101227218 B CN101227218 B CN 101227218B CN 2008100063132 A CN2008100063132 A CN 2008100063132A CN 200810006313 A CN200810006313 A CN 200810006313A CN 101227218 B CN101227218 B CN 101227218B
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Abstract
The example of the invention discloses a method for multi input multi output middle precode, which comprises choosing phase parameter through a signal indicated value, carrying out phase modulation according to a power value of modulating data from the phase parameter, and obtaining a modulating power value, the modulating data comprise at least two paths of data which are obtained through modulating the coding data, inputting each path of the modulating data with the modulating power value respectively to a multiplier, and obtaining precoding data which are output from the multiplier. Correspondingly, the example of the invention also provides a precoding device and a system. The technical proposal in the example of the invention can concretely realize precoding for data in the multi-input multi-output MIMO.
Description
Technical field
The present invention relates to communication technical field, be specifically related to method, pre-coding apparatus and the system of precoding in a kind of multiple-input and multiple-output.
Background technology
Along with development of wireless communication devices, people have higher requirement to the validity and the reliability of wireless transmission, so begin to occur MIMO (multiple input multiple output, multiple-input and multiple-output) technology.The MIMO technology is utilized the Spatial Dimension resource, adopt multi-antenna technology simultaneously at transmitting terminal and receiving terminal, under the prerequisite that does not increase transmitting power and bandwidth, significantly improve the transmission capacity of wireless communication system, also can make full use of the multipath transmission in the radio transmission, the availability of frequency spectrum and link reliability are greatly improved.
Prior art proposes to utilize D-TxAA (Double Transmit Antenna Array, double antenna transmission array) to realize MIMO.D-TxAA is a kind of closed loop precoding Pre-coding scheme in essence, and the transmission data of two antennas are carried out precoding after respectively through coding and modulation, output then.
The prior art scheme proposes the data input precoding Pre-coding module after encoded and the modulation is carried out precoding in precoding Pre-coding module, obtains pre-code data, then output.
In research and practice process to prior art, the inventor finds that there is following problem in prior art:
Just propose in the prior art to utilize D-TxAA to realize the framework scheme of MIMO, but specifically do not provide the method for how data being carried out precoding.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides method, pre-coding apparatus and the system of precoding in a kind of multiple-input and multiple-output, can be in multiple-input and multiple-output MIMO specific implementation to the precoding of data.
For solving the problems of the technologies described above, embodiment provided by the present invention is achieved through the following technical solutions:
The embodiment of the invention provides the method for precoding in a kind of multiple-input and multiple-output, comprising: the bit place value of clock counter is set to the signal indicated value; When the signal indicated value is first value, for first via modulating data is selected phase parameter e
-j0, be that the second road modulating data is selected phase parameter e
J0When the signal indicated value is second value, for first via modulating data is selected phase parameter e
-j φ, be that the second road modulating data is selected phase parameter e
J φAccording to described phase parameter the performance number of corresponding modulating data is carried out the phase place adjustment, obtain adjusting performance number, the data of described modulating data for obtaining after coded data is modulated; Each road modulating data is imported multiplier with described adjustment performance number respectively, obtain from the pre-code data of described multiplier output.
The embodiment of the invention also provides and corresponding pre-coding apparatus of above-mentioned method for precoding and multi-input multi-output system.
Technique scheme as can be seen, embodiment of the invention technical scheme is by increasing the phase place adjustment process to data, and when selecting phase parameter, be to select according to the signal indicated value, thereby having provided the method for specifically data being carried out precoding, this method is simple and flexible.
Description of drawings
Fig. 1 is that the embodiment of the invention is carried out the framework schematic diagram that MIMO handles by D-TxAA;
Fig. 2 is that the embodiment of the invention one mimo system carries out the schematic diagram that precoding Pre-coding handles;
Fig. 3 is the Pre-coding circuit diagram of antenna 2 in the embodiment of the invention one;
Fig. 4 is that the embodiment of the invention one is carried out the electrical block diagram that addition is handled;
Fig. 5 is that the embodiment of the invention two mimo systems carry out the schematic diagram that precoding Pre-coding handles;
Fig. 6 is the structural representation of embodiment of the invention pre-coding apparatus;
Fig. 7 is an embodiment of the invention multi-input multi-output system structural representation.
Embodiment
Seeing also Fig. 1, is that the embodiment of the invention is carried out the framework schematic diagram that MIMO handles by D-TxAA.
As shown in Figure 1, comprise two independent transmission data TB1 and TB2, also comprise encoder, modulator, precoding Pre-coding module.Wherein, modulator comprises spread spectrum module, scrambling module and power control module.Coding, spread spectrum, scrambling and the power control of whole data path before carrying out precoding Pre-coding handled and all used identical circuit, and the control of two cover circuit is separate.After precoding Pre-coding resume module, data are from antenna 1 and antenna 2 outputs.
Seeing also Fig. 2, is that the embodiment of the invention one mimo system carries out the schematic diagram that precoding Pre-coding handles.
Simply introduce earlier the implication of symbol among Fig. 2.
Cycle_cnt[0], the value (bit) of the lowest bit position of expression clock counter, the value of this bit is 0 or 1.Mimo_en, expression cell-level MIMO indicated value, indicated value are that 0 or 1,1 expression needs the MIMO modulation, and 0 expression does not need the MIMO modulation, and perhaps 1 expression does not need the MIMO modulation, and 0 expression needs the MIMO modulation.The data of importing among the figure comprise data after the TB1 modulation and the data after the TB2 modulation.e
J φWith e
-j φIt is antenna phase by the DSP configuration.In addition, also comprise multiplier and adder among the figure.
Introduce the course of work shown in Fig. 2 more in conjunction with the accompanying drawings in detail.
Work as cycle_cnt[0]=0 processing time as antenna 1, the phase parameter of corresponding selection is e
-j0And e
J0, TB1 and e
-j0Adopt multiplier to multiply each other and obtain wherein a circuit-switched data, TB2 and the e of antenna 1
J0Adopt multiplier to multiply each other and obtain another circuit-switched data of antenna 1.If the indicated value of mimo_en is, adopt adder to carry out exporting after the sum operation this two paths of data, at 1 o'clock as the dateout of antenna 1; If the indicated value of mimo_en is 0 o'clock, this two paths of data is exported respectively.
As cycle_cnt[0]=1 the time as processing time of antenna 2, the phase parameter e of corresponding selection
-j φAnd e
J φ, TB1 and e
-j φAdopt multiplier to multiply each other and obtain wherein a circuit-switched data, TB2 and the e of antenna 2
J φAdopt multiplier to multiply each other and obtain another circuit-switched data of antenna 2.If the indicated value of mimo_en is, adopt adder to carry out exporting after the sum operation this two paths of data, at 1 o'clock as the dateout of antenna 2; If the indicated value of mimo_en is 0 o'clock, this two paths of data is exported respectively.
Need to prove, also can be with cycle_cnt[0]=1 processing time as antenna 1, cycle_cnt[0]=0 o'clock processing time as antenna 2.
Can find that TB1 and TB2 are before carrying out precoding Pre-coding, coding and modulation all are independently, design according to existing coding and modulation protocol, so TB1 and TB2 have separately output port in modulating part.Under the MIMO situation, used TB1 and TB2 this two cover codings and modulation resources, when in the end exporting two-way carried out that data after the precoding add and, as the output of 1 MIMO sub-district.In addition, because according to existing protocol, just can realize the data processing of a sub-district at next cover coding of general mode and modulation resources, therefore under the non-MIMO situation, above-mentioned 1 MIMO sub-district can be split into 2 sub-districts, be about to the data output separately respectively after TB1 and TB2 carry out precoding, be used for corresponding two sub-districts, thereby realize the increase of sub-district.
Above-mentioned introduction be that mimo system carries out the schematic diagram that precoding Pre-coding handles, wherein antenna 1 and antenna 2 have precoding Pre-coding circuit respectively.Below illustrate with the precoding Pre-coding circuit of antenna 2.
Seeing also Fig. 3, is the Pre-coding circuit diagram of antenna 2 in the embodiment of the invention one.
Only drawn among Fig. 3 Pre-coding circuit diagram of TB1, the Pre-coding circuit structure diagram of TB2 and TB1's is identical.The Pre-coding process is realizing through after scrambling module and the power control module in the embodiment of the invention, so the input data among Fig. 3 are that TB1 is carried out obtaining after the scrambling, comprise i (real part) data scr_i and, q (imaginary part) data scr_q.
Comprising 3 circuit-switched data: scr_i0 shown in Fig. 3, is the real part score value of TB1; Scr_q0 is the imaginary part score value of TB1; Pwr is the performance number that obtains through after the power control resume module.
When carrying out the MIMO modulation, comprise V11, V12, these four phase parameters of V21, V22:
As can be known, the value of V11 and V12 is
The value of V21 and V22 is
(value in the time of φ=π/4,3 π/4,5 π/4,7 π/4) is so can adopt 2 bit values to represent to V21 (V22).: " 00 ", corresponding 1-j; " 01 ", corresponding-(1-j); " 10 " corresponding 1+j; " 11 " correspondence-(1+j).With these the value with
Multiply each other, just can obtain the value of V21 (V22).For V11 and V12, because value person is
So all corresponding numerical value 1 of 2 bit values, thus directly with
Multiply each other, just can obtain the value of V11 (V12).
Introduce the course of work shown in Fig. 3 more in conjunction with the accompanying drawings.
As described in Figure 3, with 2 bit value value corresponding among the figure with
Multiply each other, just can obtain these two phase parameters of V11 and V21,, then can obtain these two phase parameters of V12 and V22 for the situation (not drawing among the figure) of TB2.Performance number pwr and phase parameter V11 and the V21 of input are multiplied each other, thereby realization obtains adjusting performance number to the phase place adjustment of performance number, comprises the pwr_i and the pwr_q of i, q two-way correspondence.
Then scr_i_0 and scr_q_0 and the adjustment performance number (comprising these two parts of pwr_i and pwr_q) of input are carried out complex multiplication operation, obtain i, the dateout on q road.Be specially:
Scr_i_0 and pwr_i multiply each other, and obtain a wherein circuit-switched data, and scr_q_0 and pwr_q multiply each other and obtain another circuit-switched data, then this two paths of data are carried out addition, obtain the dateout pwr_data_i0 on i road.
Scr_i_0 and pwr_q multiply each other, and obtain a wherein circuit-switched data, and scr_i_0 and pwr_q multiply each other and obtain another circuit-switched data, then this two paths of data are carried out addition, obtain the dateout pwr_data_q0 on q road.
Pwe_data_i0 and pwr_data_q0 are exactly real part and the imaginary part that TB1 carries out the pre-code data that obtains after the precoding.For TB2, the data of input are scr_i_1 and scr_q_1, then can obtain the dateout pwr_data_i1 on i road and the dateout pwr_data_q1 on q road.
Above-mentioned is to illustrate with antenna 2, for antenna 1, only the performance number pwr of input need be multiply by
Obtain adjusting performance number, with the i of input, q circuit-switched data and this adjustment performance number multiply each other, and obtain i, the dateout on q road then.
After the pre-code data that obtains TB1 and this two-way of TB2, this two-way pre-code data is carried out addition, close the road module by antenna and finish, antenna closes the road module and comprises two adders.
Seeing also Fig. 4, is that the embodiment of the invention one is carried out the electrical block diagram that addition is handled.
As shown in Figure 4, for antenna 1 and antenna 2, after the scr_i_0 of TB1 and scr_q_0 handle through precoding Pre-coding, obtain pre-code data pwr_data_ant1_tb0 (the TB1 pre-code data of antenna 1), pwr_data_ant2_tb0 (the TB1 pre-code data of antenna 2, the data when just referring to pwr_data_i0 among Fig. 3 and pwr_data_q0 serial output); After the scr_i_1 of TB2 and scr_q_1 handle through precoding Pre-coding, obtain pre-code data pwr_data_ant1_tb1 (the TB2 pre-code data of antenna 1), pwr_data_ant2_tb1 (the TB2 pre-code data of antenna 2, the data the during output of pwr_data_i1 and pwr_data_q1 serial just).
Pwr_data_ant1_tb0 and pwr_data_ant1_tb1 are carried out the dateout ant1_data that sum operation obtains antenna 1 in first adder that antenna closes the road module, pwr_data_ant2_tb0 and pwr_data_ant2_tb1 are carried out sum operation in second adder that antenna closes the road module, obtain the dateout ant2_data of antenna 2.
Need to prove, be that TB1 and the input of TB2 two-way transmission data parallel are encoded to example among the embodiment one, if clock frequency doubles, encoder can be finished the coding of 2 haplotype data amounts under original clock in the identical time, just TB1 and TB2 two-way transmission data string row can be imported, so the embodiment of the invention also is applicable to the situation of serial input.
Seeing also Fig. 5, is that the embodiment of the invention two mimo systems carry out the schematic diagram that precoding Pre-coding handles.
As shown in Figure 5, only use a cover encoder and a modulator, in addition, also corresponding increase is used for data cached memory.Increased cycle_cnt[1 among Fig. 5], the value of minimum second bit of expression clock counter is according to the value selection TB1 of this bit and the data behind the TB2 coding.
The course of work shown in Fig. 5 is specially:
TB1 and TB2 are sent into encoder successively encode, clock frequency is doubled, make encoder finish the coding of 2 haplotype data amounts under original clock in the identical time.Data behind the coding are buffered in respectively among the two block storage RAM.Pass through cycle_cnt[1] value select data behind TB1 and the TB2 coding and the data after the modulation.As cycle_cnt[1]=0 the time, select the data behind the TB1 coding, as cycle_cnt[1]=1 the time, select the data behind the TB2 coding, and successively in the input modulator.The data of carrying out modulation treatment output through modulator are that corresponding TB1, TB2, TB1, TB2... export successively.The output of modulating data is divided into two branch roads up and down among the figure, works as cycle_cnt[1]=0, the modulating data of corresponding TB1 is exported from top branch road, following branch road is output as 0, as cycle_cnt[1]=1 the time, the modulating data of corresponding TB1 is exported from following branch road, above branch road be output as 0.Data after TB1, the TB2 modulation are divided into i, export successively on the q road, also uses cycle_cnt[0] as the indication of selecting phase parameter, the cycle_cnt[1 among the figure shown in the first half]=phase parameter of 0 corresponding selection is e
-j0, cycle_cnt[1]=phase parameter of 1 corresponding selection is e
-j φ, the cycle_cnt[1 shown in the latter half]=phase parameter that 0 corresponding selection is selected is e
J0, cycle_cnt[1]=phase parameter that 1 corresponding selection is selected is e
J φ
Each phase parameter and performance number pwr multiplied each other realize phase place adjustment to performance number obtaining adjusting performance number.Then after the modulation that will export successively data with adjust performance number and carry out complex multiplication operation, obtain i, the pre-code data of the serial output on q road, and according to cycle_cnt[0] the value selection memory carry out buffer memory.For branch road (corresponding TB1) top among the figure, cycle_cnt[0]=0 o'clock, phase parameter e will be adopted
-j0The pre-code data that obtains stores in first memory cycle_cnt[0 into as wherein one road TB1 pre-code data of antenna 1]=1 o'clock, phase parameter e will be adopted
-j φThe pre-code data that obtains stores in second memory as wherein one road TB1 pre-code data of antenna 2.In like manner, for branch road (corresponding TB2) following among the figure, cycle_cnt[0]=0 o'clock, will adopt phase parameter e
J0The pre-code data that obtains stores in the 3rd memory cycle_cnt[0 into as wherein one road TB2 pre-code data of antenna 1]=1 o'clock, phase parameter e will be adopted
J φThe pre-code data that obtains stores in the 4th memory as wherein one road TB2 pre-code data of antenna 2.
Because pre-code data also is to export successively according to the order of TB1, TB2, so behind the TB1 pre-code data buffer memory with output, wait for that two clock cycle carry out addition with the TB2 pre-code data input summer of output, obtain the final dateout of antenna.Be specially: after the TB1 pre-code data of the antenna 1 of first memory buffer is waited for two clock cycle, carry out sum operation with the TB2 pre-code data of the antenna 1 of the 3rd memory buffer, obtain the dateout of antenna 1, after the TB1 pre-code data of second memory buffer antenna 2 waited for two clock cycle, carry out sum operation with the TB2 pre-code data of the antenna 2 of the 4th memory buffer, obtain the dateout of antenna 2.
Can find that the technical scheme of the technical scheme of the embodiment of the invention two and embodiment one relatively equally can specific implementation precoding Pre-coding, and can reduce nearly half device resource.
Foregoing describes the method that the embodiment of the invention is carried out precoding in detail, and corresponding, the embodiment of the invention provides a kind of pre-coding apparatus and multi-input multi-output system.
Seeing also Fig. 6, is the structural representation of embodiment of the invention pre-coding apparatus.
As described in Figure 6, pre-coding apparatus comprises: phase parameter unit 601, power cell 602 and processing unit 603.
Phase parameter unit 601 is used for selecting phase parameter by the signal indicated value.
Power cell 602 is used for according to the phase parameter that described phase parameter unit 601 is selected the performance number of modulating data being carried out the phase place adjustment, obtains adjusting performance number, and described modulating data comprises the data that obtain after two-way is modulated coded data at least.
Processing unit 603 is used for each road modulating data is imported multiplier with the adjustment performance number that described power cell 602 is determined respectively, obtains from the pre-code data of described multiplier output.
Described phase parameter unit 601 comprises: unit 6011 and selected cell 6012 are set.
Unit 6011 is set, and the bit place value that is used for clock counter is set to the signal indicated value;
Selected cell 6012 is used for when the signal indicated value is first value, for first via modulating data is selected phase parameter e
-j0, be that the second road modulating data is selected phase parameter e
J0When the signal indicated value is second value, for first via modulating data is selected phase parameter e
-j φ, be that the second road modulating data is selected phase parameter e
J φ
Described power cell 602 comprises: acquiring unit 6021, adjustment unit 6022.
Acquiring unit 6021 is used to obtain the phase parameter that described phase parameter unit is selected, and obtains the performance number of the modulating data of input.
Adjustment unit 6022 is used for described phase parameter and performance number multiplied each other and carries out the phase place adjustment, the adjustment performance number of the modulating data that obtains importing.
Described processing unit 603 further comprises: first processing unit 6031 and second processing unit 6032.
First processing unit 6031 is used for the real part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtains the first real part score value and the first imaginary part score value; The imaginary part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtain the second real part score value and the second imaginary part score value.
Second processing unit 6032, the described first real part score value and the described second real part score value that are used for obtaining from described first processing unit 6031 carry out addition, obtain the pre-code data real part of each road modulating data; To carry out addition from described first imaginary part score value and the described second imaginary part score value that described first processing unit 6031 obtains, obtain the pre-code data imaginary part of each road modulating data.
Seeing also Fig. 7, is embodiment of the invention multi-input multi-output system structural representation.
As shown in Figure 7, multi-input multi-output system comprises: encoder 701, modulator 702, pre-coding apparatus 703.
Encoder 701 is used for the input data are encoded, and obtains coded data;
Modulator 702 is used for described coded data is modulated, and obtains two-way modulating data at least;
Pre-coding apparatus 703 is used for selecting phase parameter by the signal indicated value, according to described phase parameter the performance number of described modulating data is carried out the phase place adjustment, obtains adjusting performance number; Each road modulating data is imported multiplier with described adjustment performance number respectively, obtain from the pre-code data of described multiplier output.
Described multi-input multi-output system can be: comprise two encoders 701 at least, obtain two-way coded data at least after the data that are used for importing walking abreast are encoded respectively.
Described multi-input multi-output system also can be: contain an encoder 701, also comprise two memories 704 at least; Described encoder 701 obtains two-way coded data at least after being used for successively the data of serial input being encoded, and in described different memory 704, carry out buffer memory, accordingly, described pre-coding apparatus 703 carries out buffer memory from the pre-code data of described multiplier output the memory of selecting according to the signal indicated value 704.
Described multi-input multi-output system also comprises and closes road module 705, is used for the pre-code data from the multiplier output of described pre-coding apparatus 703 is closed the road computing, obtains dateout.
The described road module 705 of closing comprises: first combiner unit 7051 and second combiner unit 7052.
First combiner unit 7051, the pre-code data input first adder of each the road modulating data when being used for that the signal indicated value is first value obtains first dateout.
Second combiner unit 7052, the pre-code data input second adder of each the road modulating data when being used for that the signal indicated value is second value obtains second dateout.
In sum, embodiment of the invention technical scheme passes through to increase the phase place adjustment process to data, and is to select according to the signal indicated value when selecting phase parameter, thereby has provided the method for specifically data being carried out precoding, and this method is simple and flexible.
Further, the situation that the data that embodiment of the invention technical scheme goes for importing walking abreast are encoded also goes for the situation that the data of serial input are encoded.
Further, embodiment of the invention technical scheme also designed can be directly with from the pre-code data of described multiplier output as dateout, thereby when the increase of using two cover resources realization sub-district when handling path.
More than method, pre-coding apparatus and the system of precoding in a kind of multiple-input and multiple-output that the embodiment of the invention provided is described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (17)
1. the method for precoding in the multiple-input and multiple-output is characterized in that, comprising:
The bit place value of clock counter is set to the signal indicated value;
When the signal indicated value is first value, for first via modulating data is selected phase parameter e
-j0, be that the second road modulating data is selected phase parameter e
J0
When the signal indicated value is second value, for first via modulating data is selected phase parameter e
-j φ, be that the second road modulating data is selected phase parameter e
J φ
According to described phase parameter the performance number of corresponding modulating data is carried out the phase place adjustment, obtain adjusting performance number, the data of described modulating data for obtaining after coded data is modulated;
Each road modulating data is imported multiplier with described adjustment performance number respectively, obtain from the pre-code data of described multiplier output.
2. the method for precoding in the multiple-input and multiple-output according to claim 1 is characterized in that:
Described coded data comprises two-way at least, is to obtain after the data of parallel input are encoded.
3. the method for precoding in the multiple-input and multiple-output according to claim 1 is characterized in that:
Described coded data comprises two-way at least, is to obtain after successively the data of serial input being encoded, and in different memory, carries out buffer memory, and, by the coded data of signal indicated value selection buffer memory.
4. according to the method for precoding in each described multiple-input and multiple-output of claim 1 to 3, it is characterized in that:
Describedly according to described phase parameter the performance number of corresponding modulating data is carried out the phase place adjustment and is specially:
The performance number of described phase parameter and input is multiplied each other.
5. according to the method for precoding in each described multiple-input and multiple-output of claim 1 to 3, it is characterized in that:
Described modulating data is a plural number, and described adjustment performance number is a plural number, and is corresponding,
Described with each road modulating data respectively with described adjustment performance number input multiplier, obtain to comprise from the pre-code data of described multiplier output:
The real part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtain the first real part score value and the first imaginary part score value; The imaginary part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtain the second real part score value and the second imaginary part score value;
Described first real part score value and the described second real part score value are carried out addition, obtain the pre-code data real part of each road modulating data; Described first imaginary part score value and the described second imaginary part score value are carried out addition, obtain the pre-code data imaginary part of each road modulating data.
6. the method for precoding in the multiple-input and multiple-output according to claim 2 is characterized in that:
Described method comprises that further the pre-code data that will export from described multiplier is input to adder, obtains from the data of described adder output;
Perhaps, directly will be from the pre-code data of described multiplier output as dateout.
7. the method for precoding in the multiple-input and multiple-output according to claim 6 is characterized in that:
Describedly will be input to adder from the pre-code data of described multiplier output or be to determine directly according to multiple-input and multiple-output MIMO indicated value as dateout.
8. the method for precoding in the multiple-input and multiple-output according to claim 3 is characterized in that:
Described method further comprises and will carry out buffer memory the memory of selecting according to the signal indicated value from the pre-code data of described multiplier output, and the pre-code data of buffer memory is input to adder, obtains from the data of described adder output.
9. according to the method for precoding in claim 6 or the 8 described multiple-input and multiple-outputs, it is characterized in that:
Described pre-code data is input to adder, obtains to comprise from the data of described adder output:
The pre-code data input first adder of each the road modulating data when the signal indicated value is first value obtains first dateout;
The pre-code data input second adder of each the road modulating data when the signal indicated value is second value obtains second dateout.
10. a pre-coding apparatus is characterized in that, comprising:
The phase parameter unit is used for selecting phase parameter by the signal indicated value;
Power cell is used for according to the phase parameter that described phase parameter unit is selected the performance number of modulating data being carried out the phase place adjustment, obtains adjusting performance number, and described modulating data comprises the data that obtain after two-way is modulated coded data at least;
Processing unit is used for each road modulating data is imported multiplier with the adjustment performance number that described power cell is determined respectively, obtains from the pre-code data of described multiplier output;
Described phase parameter unit comprises:
The unit is set, and the bit place value that is used for clock counter is set to the signal indicated value;
Selected cell is used for when the signal indicated value is first value, for first via modulating data is selected phase parameter e
-j0, be that the second road modulating data is selected phase parameter e
J0When the signal indicated value is second value, for first via modulating data is selected phase parameter e
-j φ, be that the second road modulating data is selected phase parameter e
J φ
11. pre-coding apparatus according to claim 10 is characterized in that:
Described power cell comprises:
Acquiring unit is used to obtain the phase parameter that described phase parameter unit is selected, and obtains the performance number of the modulating data of input;
Adjustment unit is used for described phase parameter and performance number multiplied each other and carries out the phase place adjustment, obtains adjusting performance number.
12., it is characterized in that described processing unit comprises according to claim 10 or 11 described pre-coding apparatus:
First processing unit is used for the real part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtains the first real part score value and the first imaginary part score value; The imaginary part score value of each road modulating data is carried out multiplication mutually with described adjustment performance number input multiplier respectively, obtain the second real part score value and the second imaginary part score value;
Second processing unit, the described first real part score value and the described second real part score value that are used for obtaining from described first processing unit carry out addition, obtain the pre-code data real part of each road modulating data; To carry out addition from described first imaginary part score value and the described second imaginary part score value that described first processing unit obtains, obtain the pre-code data imaginary part of each road modulating data.
13. a multi-input multi-output system is characterized in that, comprising:
Encoder is used for the input data are encoded, and obtains coded data;
Modulator is used for described coded data is modulated, and obtains two-way modulating data at least;
Pre-coding apparatus, the bit place value that is used for clock counter is set to the signal indicated value, when the signal indicated value is first value, for first via modulating data is selected phase parameter e
-j0, be that the second road modulating data is selected phase parameter e
J0, when the signal indicated value is second value, for first via modulating data is selected phase parameter e
-j φ, be that the second road modulating data is selected phase parameter e
J φ, according to described phase parameter the performance number of corresponding modulating data is carried out the phase place adjustment, obtain adjusting performance number; Each road modulating data is imported multiplier with described adjustment performance number respectively, obtain from the pre-code data of described multiplier output.
14. multi-input multi-output system according to claim 13 is characterized in that: the number of described encoder is at least two;
Described at least two encoders obtain two-way coded data at least after the data that are used for importing walking abreast are encoded respectively.
15. multi-input multi-output system according to claim 13 is characterized in that: the number of described encoder is one;
Described system also comprises two memories at least;
A described encoder obtains two-way coded data at least after being used for successively the data of serial input being encoded, and carry out buffer memory in described different memory, and is corresponding,
Described pre-coding apparatus will carry out buffer memory from the pre-code data of described multiplier output the memory of selecting according to the signal indicated value.
16., it is characterized in that according to each described multi-input multi-output system of claim 13 to 15:
Also comprise and close the road module, be used for the pre-code data of exporting from the multiplier of described pre-coding apparatus is closed the road computing, obtain dateout.
17. multi-input multi-output system according to claim 16 is characterized in that:
The described road module of closing comprises:
First combiner unit, the pre-code data input first adder of each the road modulating data when being used for that the signal indicated value is first value obtains first dateout;
Second combiner unit, the pre-code data input second adder of each the road modulating data when being used for that the signal indicated value is second value obtains second dateout.
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| WO2005074221A1 (en) * | 2004-01-27 | 2005-08-11 | Agere Systems Inc. | Frame format for a mimo-ofdem system |
| CN1835425A (en) * | 2005-03-16 | 2006-09-20 | 松下电器产业株式会社 | Self-adaptive modulation method based on multi-user precode |
| CN1956430A (en) * | 2005-10-27 | 2007-05-02 | 财团法人工业技术研究院 | MIMO OFDM system and precoding and feedback method of it |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005074221A1 (en) * | 2004-01-27 | 2005-08-11 | Agere Systems Inc. | Frame format for a mimo-ofdem system |
| CN1835425A (en) * | 2005-03-16 | 2006-09-20 | 松下电器产业株式会社 | Self-adaptive modulation method based on multi-user precode |
| CN1956430A (en) * | 2005-10-27 | 2007-05-02 | 财团法人工业技术研究院 | MIMO OFDM system and precoding and feedback method of it |
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